Because quantum communications allows to have unconditionally stable communication, and on the other hand, a quantum processor could dramatically speed up computations, there is a great deal of attentions in techniques to protect quantum information from noise [1]}. Hence, in this paper we are going to study and compare the entanglement of three different types of antiferromagnetic fermionic chains with defect caused by a boson under decoherence. In this regard, we consider the entanglement between first and the last half-spins in a finite size fermionic chain consisting of a single mobile boson. Three types of the suggested model with different spin arrangement are determined by changing the position of the single boson along the chain.
